(332a) Enhancement of Excess Sludge Hydrolysis with Dielectric Barrier Discharge Plasma Pretreatment

The application of dielectric barrier discharge to treat excess sludge(ES) was investigated.The examination of organic matters distribution along different extracellular polymeric substances(EPS) layers is of great importance for manifesting the mechanism of sludge organics transfer by dielectric barrier discharge. Scrutinize the dynamic variation of EPS in composition and distribution with different discharge power.

Protein and polysaccharide were the main components of EPS. Both polysaccharide and protein concentration in EPS increased significantly after 20 min. Total polysaccharide increased from the initial 17.1 mg/gSS to 19.08£¬24.12£¬25.27£¬40.43 mg/gSS in accordance with the discharge power of 40, 50, 60and 70W, respectively. Compared with polysaccharide, total protein within EPS showed a more impressive growth and it increased from the 66.45 mg/gSS in the very begging to 69.45, 86.68, 96.76 and 132.22 mg/gSS, respectively. According to the total polysaccharide and total protein amplification trends within EPS, it could figure out that the increasing of discharge power could significantly enhance the decomposition of ES cytoderms and promote the release of soluble organics within cells into the outer spaces, especially protein.

References:

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